just wondering what is the best longest lasting packing to use, I have a pro pipe and the original packing is just about fucked.

When you do pack it wear a mask, also wear a mask when you start it up, there's shit flying everywhere that you can breathe in.

Acousta-Fil sounds like a good product. Can be found on ebay & it is from the UK. - Rob

http://www.thermalvelocity.co.uk/Silencer-Packing/Acousta-Fil%C2%AE-PTX----800%C2%BAC/p-117-425/